The automatic differential lock vehicle

 

(57) Abstract:

The invention relates to mechanical engineering and can be used in vehicles terrain. The automatic differential lock of a vehicle includes coupling halves 3 and 4, the elements of the mechanical connection of the coupling in the form of Cams with straight and inclined sections, return springs 12 and 13. The coupling 3 is installed on the splined Cup differential. The coupling 4 is made in one piece with polovoy gear 5. Return spring 12 is installed between the coupling 3 and the inner end surface of the Cup differential. Return spring 13 is installed between the coupling 3 and polovoy gear 5. Simplified design and improved controllability of the vehicle. 2 Il.

The invention relates to mechanical engineering and can be used in vehicles terrain.

A device lock differential, containing friction discs mounted on the shafts leading, cross, made of two parts, plates and a return spring, which automatically locks the differential contact author is. 200, Fig. 3.53).

The disadvantage of this device is that this device is not fully locks the differential, and blocking properties largely depend on the load range on a car that is not suitable for trucks, in addition, it is necessary to increase the size differential when increasing the applied torque.

A device lock differential, containing half-coupling mounted on the leading shafts of the differential and having elements for full differential lock, return spring and a mechanism for moving the coupling, which provides a complete locking and blocking properties do not depend on the load range on the car (see the journal "Revue Technique diesel", 171, 1991, pp. 65, 68).

The closest to the essential features of the claimed technical solution is the automatic differential lock, containing half-coupling mounted on the leading shafts and having a mechanical connection elements in the form of Cams with straightforward work areas for full differential lock, control sensors turns leading shaft, registering ptx2">

A disadvantage of the known device is the complexity of the design, as the sensor and recording device are complex electronic devices, the drive mechanism move is part of a pneumatic or hydraulic system of the vehicle, which involves the coordination of their parameters, the signals from the sensors to the register, and from him to the mechanism for moving the coupling halves are held by the electric wire, which must be protected from impact with foreign objects when the vehicle is moving, to optimally on the master bridge and in the vehicle, in addition, possible loss of controllability of the vehicle on the road with unstable coupling properties as the automatic lock operates in an oscillatory mode. So after coupling the coupling device to lock automatically to control the difference of the rotation speeds of the shafts leading disables equal intervals of time the movement of the coupling, in this case, if a slippery patch has not ended, then starts slipping, then the signals from the control sensors include a mechanism for moving the coupling, the differential is locked. This process thuja design automatic locking differential of the vehicle and to improve the controllability of the vehicle.

The problem is solved due to the fact that in the automatic differential lock of a vehicle containing coupling with the mechanical connection elements in the form of Cams with straightforward work areas and installed on rotating parts having between a differential connection, the mechanism for moving the coupling, the mechanical connection elements additionally have sloping working area under the angle, determining the conditions lock the differential, and the mechanism for moving the coupling is made in the form of a spring.

The analysis of the prior art, including searching by the patent and scientific and technical information sources, has allowed to establish that similar, characterized by signs, identical with all the essential features of the claimed technical solution is not found. The definition from the list of identified unique prototype as the most similar set of features analogue has allowed to establish the essential in relation to the technical result of the distinctive features in the claimed technical solution described in the claims. Therefore, the claimed technical solution meets delienne the device has the characteristics which are not in the known technical solutions, and their use in the claimed combination of features gives the opportunity to learn new technical result, therefore, the proposed solution meets the condition of "inventive step". 2 the Invention is illustrated by drawings, where

in Fig. 1 shows the automatic differential lock of the vehicle in the incision;

in Fig.2 - section a-a in Fig.1.

The automatic differential lock of a vehicle includes a Cup differential, driven in rotation of the pinion. One of the cups differential consists of two parts 1 and 2, which form the inner hole where the coupling half 3 with the possibility of axial movement along the slots made in part 1 cups differential.

The coupling 4 is made in one piece with polovoy gear 5. Elements of mechanical connection between the coupling halves 3 and 4 are made in the form of Cams 6, having a straight working sections 7 and inclined working areas 8.

Half-shaft gear 5 is located on the axis 9 and rests on one side of the crossbar of the differential through a thrust bearing 10, and the other is 11 has a locking condition, incoming in a groove made in the bearing surface part 2 a Cup of differential and preventing the washer 11 against rotation.

To return coupling 3 to the initial position has two springs, one of which is a disc spring 12, is installed between the coupling 3 and the inner end surface portion 2 cups differential. The spring 12 is dish-shaped to limit the geometry of the differential. Another spring 13 is installed between the coupling 3 and the thrust washer 11.

To adjust the gap between the coupling halves 3 and 4 are the washers 14 and 15, which are mounted respectively between the spring 12 and the inner end surface portion 2 cups of differential and between the spring 13 and thrust washer 11.

Between the Cup differential and polovoy gear 5 has a differential communication satellites to his, located on the crossbar.

The automatic differential lock of the vehicle is as follows.

In straight-line motion the angular velocity of the rotation Cup differential relative to polovoy gear 5 is equal to zero. The Cams 6 of the coupling halves 3 and 4 are in any of the provisions of the slippery road surface or when turning the vehicle Cup of differential and half-shaft gear 5 tend to rotate at different angular velocities, loading inclined working areas 8 lugs 6 of the coupling halves 3 and 4 torque. When the coupling halves 3 and 4 due to the interaction of inclined working areas 8 occurs axial force which overcomes the force of spring 12 moves the coupling 3 to exit out of engagement with the Cams 6 coupling 4, thereby the coupling 3 is rotated relative to the coupling hub 4 (see Fig.2, 2B). Further relative rotation occurs on the end surfaces of the Cams 6 of the coupling halves 3 and 4 (see Fig.2, 2B).

After the interaction of end surfaces of the Cams 6 and the coupling half 3 under the action of the clamping spring 12 slides over the inclined working areas 8 of the coupling 4, jamming while the return spring 13 (see Fig.2, 2G).

Axial velocity coupling 3 is determined by the following formula:

Voce. = V.tg,

V. = Rel.r,

where Voce. - the axial velocity coupling;

Vo. the relative linear speed between the Cup differential and polovoy gear 5;

- the angle of the work area 8 Cams 6;

Rel.- the relative angular velocity between the Cup differential and polovoy gear 5;

r is the average radius of Cams 6 of the coupling.

Since the rotation of the transport creditprofile 13 manages to push the coupling half 3 before as will contact working straight sections 7, thereby returns the coupling half 3 in the original (initial) position, the differential is not locked.

When the slipping of the vehicle when the relative speed between the Cup differential and polovoy gear 5 has a significant value, the spring 13 does not have time to push the coupling 3, a contact straight portions 7, thereby locking differential (see Fig.2, 2D).

The differential remains locked up until the compression force between the rectilinear work areas 7 of the coupling halves 3 and 4, arising from the action of the torque which balances the force of the return spring 13. When you change or disappearance of torque due to alignment of the load on the axles, gear, etc., the spring 13 returns the coupling 3 to the original position.

The claimed technical solution to meet the requirement of industrial applicability and possible to implement on stationary process equipment using modern technologies.

The automatic differential lock of a vehicle containing two coupling halves, one is straight and inclined work areas, return spring, characterized in that the second coupling half mounted on the splined Cup differential, and a return spring mounted between the second coupling and polovoy gear, in addition, the device is equipped with an additional return spring installed between the second coupling and the inner end surface of the Cup differential.

 

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